It is recommended that you use an eligible Mastercard, Visa, or American Express credit card for your Card Linked Offer program purchases. If you choose to use your debit card, do not enter your PIN at checkout. Instead, select “credit” instead of “debit” when your card is swiped or inserted (you will need to sign a receipt instead of entering your PIN). If you use your PIN for debit, GasBuddy will not receive your transaction information and you will not be eligible for or receive GasBack for the purchase.